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<TITLE>[Chapter 24] 24.59 java.io.Serializable (JDK 1.1)</TITLE>
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<DIV CLASS=sect1>
<h2 CLASS=sect1><A CLASS="TITLE" NAME="JNUT2-CH-24-SECT-59">24.59 java.io.Serializable (JDK 1.1)</A></h2>

<DIV CLASS=sect2>
<h3 CLASS=sect2><A CLASS="TITLE" NAME="JNUT2-CH-24-SECT-59.1"></A></h3>
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<P CLASS=para>
The <tt CLASS=literal>Serializable</tt> interface defines no methods or
constants. A class should implement this interface simply
to indicate that it allows itself to be serialized
and deserialized with
<tt CLASS=literal>ObjectOutputStream.writeObject()</tt> and
<tt CLASS=literal>ObjectInputStream.readObject()</tt>. 

<P CLASS=para>
Objects that need special handling during
serialization or deserialization may implement one or both
of the following methods.  Note, however, that these methods
are not part of the <tt CLASS=literal>Serializable</tt> interface:

<DIV CLASS=screen>
<P>
<PRE>
private void writeObject(java.io.ObjectOutputStream out) 
                  throws IOException
private void readObject(java.io.ObjectInputStream in)
                    throws IOException, ClassNotFoundException;
</PRE>
</DIV>

<P CLASS=para>
Typically the <tt CLASS=literal>writeObject()</tt> method performs any
necessary cleanup or preparation for serialization,
invokes the <tt CLASS=literal>defaultWriteObject()</tt> method of the
<tt CLASS=literal>ObjectOutputStream</tt> to serialize the
non-<tt CLASS=literal>transient</tt> fields of the class, and then
optionally writes any additional data that are required.
Similarly, the <tt CLASS=literal>readObject()</tt> method typically
invokes the <tt CLASS=literal>defaultReadObject()</tt> method of the
<tt CLASS=literal>ObjectInputStream</tt>, reads any additional data
written by the corresponding <tt CLASS=literal>writeObject()</tt> method,
and finally performs any extra initialization required by the
object.  The <tt CLASS=literal>readObject()</tt> method may also register
an <tt CLASS=literal>ObjectInputValidation</tt> object to validate the
object once it is completely deserialized.

<DIV CLASS=screen>
<P>
<PRE>
public interface <tt CLASS=literal>Serializable</tt> {
}
</PRE>
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<DIV CLASS=sect2>
<h3 CLASS=sect2><A CLASS="TITLE" NAME="JNUT2-CH-24-SECT-59.2">Extended By:</A></h3>

<P CLASS=para>
Externalizable

</DIV>

<DIV CLASS=sect2>
<h3 CLASS=sect2><A CLASS="TITLE" NAME="JNUT2-CH-24-SECT-59.3">Implemented By:</A></h3>

<P CLASS=para>
BitSet, 
Boolean, 
BorderLayout, 
BreakIterator, 
Calendar, 
CardLayout, 
Character, 
CheckboxGroup, 
Class, 
Collator, 
Color, 
Component, 
Cursor, 
Date, 
DateFormatSymbols, 
DecimalFormatSymbols, 
Dimension, 
Event, 
EventObject, 
File, 
FlowLayout, 
Font, 
FontMetrics, 
Format, 
GridBagConstraints, 
GridBagLayout, 
GridLayout, 
Hashtable, 
InetAddress, 
Insets, 
Locale, 
MediaTracker, 
MenuComponent, 
MenuShortcut, 
Number, 
ObjectStreamClass, 
Point, 
Polygon, 
PropertyChangeSupport, 
Random, 
Rectangle, 
String, 
StringBuffer, 
SystemColor, 
Throwable, 
TimeZone, 
URL, 
Vector, 
VetoableChangeSupport

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